Dataset

Harmful Algal Event Database (HAEDAT)

HAB OBIS MeasurementOrFact Open in mapper Explore occurrences

The Harmful Algal Event Database (HAEDAT) is a component of the Harmful Algal Information system (HAIS) within the International Oceanographic Data and Information Exchange (IODE) of the Intergovernmental Oceanographic Commission (IOC) of UNESCO, and in cooperation with ICES, and PICES. The HAEDAT is a meta database containing records of harmful algal events. HAEDAT contains records from the ICES area (North Atlantic) since 1985, and from the PICES area (North Pacific) since 2000. IOC Regional networks in South America, South Pacific and Asia, and North Africa have recently started contributing. This instantiation of the HAEDAT database contains all species occurrences associated with harmful algal events, including abundance and toxicity ranges.

Citation: IOC-UNESCO. The Harmful Algal Event Database (HAEDAT). Accessed via https://obis.org.

Published: May 23, 2025 at 19:43

URL: http://ipt.iobis.org/hab/resource?r=haedat

Pieter Provoost
IOC-UNESCO

Henrik Enevoldsen
IOC-UNESCO

11,290
occurrence records
22,650
measurements and facts
284
taxa
186
species

Taxa

Missing and invalid fields

Field Missing Invalid
decimalLongitude 14
0.1%
eventDate 628
5.6%
maximumDepthInMeters 11,290
100.0%
minimumDepthInMeters 11,290
100.0%
scientificNameID 11,047
97.8%

Quality flags

The OBIS data quality flags are documented at https://github.com/iobis/obis-qc.

Flag Dropped Records
NO_DEPTH 11,290
100.0%
ON_LAND 1,038
9.2%
NO_MATCH 1,001
8.9%
NO_ACCEPTED_NAME 144
1.3%
WORMS_ANNOTATION_REJECT_AMBIGUOUS 124
1.1%
MARINE_UNSURE 48
0.4%
LON_OUT_OF_RANGE 14
0.1%
NO_COORD 14
0.1%
WORMS_ANNOTATION_RESOLVABLE 4
0.0%

Measurement types

DNA derived data